package com.hmdp.service.impl;

import cn.hutool.core.bean.BeanUtil;
import cn.hutool.core.bean.copier.CopyOptions;
import cn.hutool.core.lang.UUID;
import cn.hutool.core.util.RandomUtil;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.hmdp.dto.LoginFormDTO;
import com.hmdp.dto.Result;
import com.hmdp.dto.UserDTO;
import com.hmdp.entity.User;
import com.hmdp.mapper.UserMapper;
import com.hmdp.service.IUserService;
import com.hmdp.utils.RegexUtils;
import com.hmdp.utils.UserHolder;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.data.redis.connection.BitFieldSubCommands;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Service;

import javax.annotation.Resource;
import javax.servlet.http.HttpSession;
import java.time.LocalDateTime;
import java.time.format.DateTimeFormatter;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Random;
import java.util.concurrent.TimeUnit;

import static com.hmdp.utils.RedisConstants.*;
import static com.hmdp.utils.SystemConstants.USER_NICK_NAME_PREFIX;

/**
 * <p>
 * 服务实现类
 * </p>
 *
 * @author 虎哥
 * @since 2021-12-22
 */
@Slf4j
@Service
public class UserServiceImpl extends ServiceImpl<UserMapper, User> implements IUserService {
    @Resource
    private StringRedisTemplate stringRedisTemplate;
    @Qualifier("redisTemplate")
    @Autowired
    private RedisTemplate redisTemplate;


    @Override
    public Result sendCode(String phone, HttpSession session) {
        // 1.校验手机号     2.不符合返回错误信息
        if(RegexUtils.isPhoneInvalid(phone)){
            return Result.fail("手机号格式错误");
        }


        // 3.符合生成验证码
        String code = RandomUtil.randomNumbers(6);

        // 4.保存验证码到session
        stringRedisTemplate.opsForValue().set(LOGIN_CODE_KEY+phone,code,LOGIN_CODE_TTL, TimeUnit.MINUTES);

        // 5.发送验证码(比较麻烦，现在假设发送了验证码)
        log.info("发送成功："+code);

        // 6.返回ok
        return Result.ok();
    }

    @Override
    public Result login(LoginFormDTO loginForm, HttpSession session) {
        String phone = loginForm.getPhone();
        if(RegexUtils.isPhoneInvalid(phone)){
            return Result.fail("手机号格式错误");
        }

        String cachecode = stringRedisTemplate.opsForValue().get(LOGIN_CODE_KEY+phone);
        String code = loginForm.getCode();
        if(cachecode == null || !cachecode.equals(code)){
            return Result.fail("验证码错误");
        }

        // 新建用户
        User user = query().eq("phone", phone).one();
        if(user==null){
            user = createwithphone(phone);
        }

        String token = UUID.randomUUID().toString(true);

        UserDTO userDTO = BeanUtil.copyProperties(user,UserDTO.class);

        Map<String, Object> usermap = BeanUtil.beanToMap(userDTO,new HashMap<>(),
                CopyOptions.create().setIgnoreNullValue(true).setFieldValueEditor((filename,filedvalue) -> filedvalue.toString()));
        stringRedisTemplate.opsForHash().putAll(LOGIN_USER_KEY+token,usermap);
        stringRedisTemplate.expire(LOGIN_USER_KEY+token,LOGIN_USER_TTL,TimeUnit.MINUTES);

        return Result.ok(token);
    }

    @Override
    public Result sign() {
        // 1.获得用户
        Long id = UserHolder.getUser().getId();
        // 2.获取日期
        LocalDateTime now = LocalDateTime.now();
        String keysuffix = now.format(DateTimeFormatter.ofPattern(":yyyyMM"));
        String key = USER_SIGN_KEY+id+keysuffix;

        // 获得今天是第几天
        int dayOfMonth = now.getDayOfMonth();
        stringRedisTemplate.opsForValue().setBit(key,dayOfMonth-1,true);

        return Result.ok();
    }

    @Override
    public Result signCount() {
        // 1.获得用户
        Long id = UserHolder.getUser().getId();
        // 2.获取日期
        LocalDateTime now = LocalDateTime.now();
        String keysuffix = now.format(DateTimeFormatter.ofPattern(":yyyyMM"));
        String key = USER_SIGN_KEY+id+keysuffix;

        // 获得今天是第几天
        int dayOfMonth = now.getDayOfMonth();

        // 取出签到记录
        List<Long> result = stringRedisTemplate.opsForValue().bitField(key,
                BitFieldSubCommands.create().get(BitFieldSubCommands.BitFieldType.unsigned(dayOfMonth)).valueAt(0));

        if(result == null || result.isEmpty()){
            return Result.ok(0);
        }

        Long l = result.get(0);
        if(l == null || l==0){
            return Result.ok(0);
        }

        // 查看最近的连续签到次数
        int cnt=0;
        while(true){
            if((l & 1) == 0){
                break;
            }else{
                cnt++;
                l>>>=1;
            }
        }

        return Result.ok(cnt);
    }

    public User createwithphone(String phone) {
        User user = new User();
        user.setPhone(phone);
        user.setNickName(USER_NICK_NAME_PREFIX+RandomUtil.randomString(10));
        save(user);
        return user;
    }

}
